Developer Tools

Free browser-based tools for formatting JSON, comparing API responses, decoding tokens, generating test data, and handling everyday development tasks.

Tool inputs are processed locally in your browser and are not uploaded to TechFixGen.

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JSON FormatterBeautify and minify JSON with syntax highlighting.
JSON ValidatorValidate JSON instantly and pinpoint syntax errors with line, column and context details.
JSON to CSVConvert JSON arrays to CSV format instantly.
JSONPath TesterRun JSONPath queries against JSON and see every match with its path and JSON pointer.
JSON Schema ValidatorCheck a JSON document against a JSON Schema and get precise failures with paths and keywords.
JSON CompareCompare two JSON documents and instantly identify added, removed, modified, and type-changed properties.
JSON to TypeScriptGenerate readable TypeScript interfaces or type aliases from JSON objects and arrays.
YAML ↔ JSON ConverterConvert YAML to JSON and JSON to YAML safely in your browser.
XML ↔ JSON ConverterConvert XML to JSON and JSON to XML safely in your browser.
YAML Formatter & ValidatorFormat and check YAML syntax in your browser, keeping comments and structure.
XML Formatter & ValidatorIndent XML and check whether it is well-formed, directly in your browser.
Base64 Encoder & DecoderEncode and decode Base64 with Unicode and URL-safe support. Great for API tokens and JSON payloads.
URL Encoder & DecoderEncode and decode URLs with component and full-address modes, including Unicode.
HTML Entity Encoder & DecoderEncode reserved characters as named or numeric HTML entities and decode entities safely to text.
QR Code GeneratorCreate QR codes for URLs, Wi-Fi, email, text, and phone numbers with custom colors and error correction.
Number Base ConverterConvert integers between binary, octal, decimal, hexadecimal, and any base from 2 to 36 exactly.
URL Parser & InspectorBreak a URL into protocol, host, port, path, query string, and fragment, and decode its parameters.
Hash GeneratorGenerate SHA-256 hashes and checksums for text and files, with SHA-1, SHA-384 and SHA-512 support.
Password GeneratorCreate strong, random passwords with custom rules.
JWT DecoderDecode and inspect JSON Web Tokens.
UUID GeneratorGenerate v4 and v7 UUIDs instantly with bulk, format, and validate.
Timestamp ConverterConvert Unix timestamps, milliseconds and ISO 8601 dates to UTC, local and relative time.
Timezone ConverterConvert a wall-clock time between IANA timezones with DST-aware accuracy.
Date CalculatorAdd or subtract days, months, and years, or find the difference between two dates.
Cron Expression Generator & ParserCraft and parse standard 5-field cron expressions with descriptions, field breakdowns, and next run times.
CSV ViewerView, sort, and search CSV files and CSV data in a responsive, paginated table.
CSV to JSONConvert CSV data and files into clean JSON arrays, with header, delimiter, and formatting options.
CSV to SQLConvert CSV rows into safely escaped SQL INSERT statements for four dialects.
SQL FormatterFormat and beautify SQL locally with dialect selection, keyword case, indentation and syntax highlighting.
HTML FormatterFormat, beautify, and conservatively minify HTML with configurable indentation.
Markdown PreviewWrite Markdown and safely preview headings, lists, links, code blocks, tables, and task lists.
Text Diff CheckerCompare two text blocks with accessible line-by-line added, removed, changed, and unchanged results.
Regex TesterTest regular expressions online with highlights, capture groups, and a replacement preview.
cURL to Code ConverterConvert cURL commands into fetch, Axios, Python requests, and PowerShell code.
CSS FormatterFormat, beautify, and conservatively minify CSS with configurable indentation.
JavaScript FormatterFormat, beautify, and conservatively minify JavaScript with configurable indentation.
HTTP Status Code LookupLook up HTTP status codes with plain-language meanings and RFC references.
Color ConverterConvert colors between HEX, RGB, HSL, HSV, and named CSS colors with exact, local conversion.
Slug GeneratorGenerate clean, SEO-friendly URL slugs from any text with Unicode and separator options.
.gitignore GeneratorGenerate a .gitignore file from curated local templates plus your own custom ignore rules.

Browser-based processing

Every available tool processes its input locally in your browser. JSON documents, tokens, passwords, and files you paste are handled on your device and are not uploaded to TechFixGen.

Common workflows

  • Format and inspect JSON
  • Compare API responses
  • Decode JWT claims
  • Encode and decode Base64
  • Generate UUIDs
  • Generate passwords

Available categories

  • JSON — Format, validate, compare, and convert JSON into CSV or TypeScript.
  • Encoding — Encode and decode Base64, URLs, and HTML entities with Unicode support.
  • Text & Regex — Test regular expressions, format HTML, preview Markdown, and compare text in your browser.
  • Security — Generate text and file checksums, inspect JWTs, generate passwords, and create UUIDs.
  • Date & Time — Convert Unix timestamps, convert time zones, and calculate date differences — all locally in your browser.
  • CSV — View CSV data and convert rows into JSON or SQL.
  • SQL — Format SQL queries and generate INSERT statements from CSV.